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Influence of the coordination water on the after effects of the K-capture in57Co doped FeSO4×H2O (x=0,1,4,7)
Authors:J Ladriere  N Beckris  D Apers
Institution:(1) Laboratoire de Chimie Inorganique et Nucléaire, Université Catholique de Louvain Chemin du Cyclotron, 2, B-1348 Louvain-la-Neuve, Belgium
Abstract:Emission Mössbauer spectroscopy is used to investigate the physico-chemical state of57Fe atoms generated by57Co2+ clectron capture in57Co: FeSO4xH2O (x=0,1,4,7). The spectra of all the hydrates show at least three main components, the normal bivalent state, Fe2+(N), an aliovalent state, Fe3+, and one (or several) anomalous ferrous species in which the coordination sphere has been perturbated by the self-radiolysis. No Fe3+ is observed in the anhydrous compound whereas the intensity of this component increases as a function of the hydration number, reaching a saturation value of 36% for x=4 and 7.
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